Matthew 26:73

After a little while those who stood by came up and said to Peter, "Surely you are also one of them, for your accent betrays you."

Luke 22:59-60

Then after about an hour had passed, another insisted, saying, "Certainly this fellow also was with him, for he is a Galilean."

John 18:26-27

One of the servants of the high priest, a relative of him whose ear Peter had cut off, said, "Did I not see you in the garden with him?"

Treasury of Scripture Knowledge

Summary

And after a while came unto him they that stood by, and said to Peter, Surely thou also art one of them; for thy speech bewrayeth thee.

Bible References

Surely

Luke 22:59
Then after about an hour had passed, another insisted, saying, "Certainly this fellow also was with him, for he is a Galilean."
John 18:26
One of the servants of the high priest, a relative of him whose ear Peter had cut off, said, "Did I not see you in the garden with him?"